Lowest Frequency

I'm wondering what key people work in and what they consider to be the lowest frequency that they can utilize.

Any good club/rave system worth a damn should be able to broadcast 40Hz, that's just below the "lowest" F. So I used to go down there. Lately I've been staying up above working in A minor or even Bb cause it's more satisfying for your average listening experience especially for people using earbuds, heaven forbid.

Personally I'd love to go lower and lower though...I want to build these subs for the parties we throw around here that can manage 30Hz (see Bill Fitzmaurice's Tuba 60s). And my "monitoring system" can hit 35Hz not to mention that headphones can often push out 25Hz.

What's your thoughts? Keeping in mind that if you bounce a track above 180BPM it could get pitched down by a DJ, you bounce it at 165BPM it'll definitely be heard higher in a live set.

keep in mind the lower you go, the larger the amplitude the notes need to be perceived at the same level which in turn means less headroom. i frequently do stuff in the 30 to 35 hz range but more commonly work in a 40 - 55hz range.
the lowest i have ever gone with a simple sine wav was 27.5hz but that was for an ambient piece and got feedback from a couple people that it came out as distortion on their speakers.

yeah theres no point going lower if 90% of club/rave/bedroom systems cant handle it. I mean, the best Funktion One sub can only go down to 40hz, any lower n u'll need their infrabass subs that go down to 25hz which ive never seen installed at raves

alllegedly I was listening 15hz sub bass. It wass really realy deep. So my oppinion is that we can hear 25hz.

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Nobody can hear 15HZ.
You could probably feel the dispersal of molecules if you was standing between 50-75 feet away from a speaker that was capable of emitting frequencies that low.
But yeah room ambience is around 10hz.

Nobody can hear 15HZ.
You could probably feel the dispersal of molecules if you was standing between 50-75 feet away from a speaker that was capable of emitting frequencies that low.
But yeah room ambience is around 10hz.

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as I said, "allegedly" I heard it on headphones. And it was very looow sound.

It also means that if you take the relatively low frequency of 80 Hz, you can add a bit of 40Hz (for kick drum perhaps...in deep house music...) and it will sound nice and harmonic with the higher octave.

More interesting is the harmonic content of a sawtooth wave. Say your tone is tuned to 40Hz - now there are lots of other frequencies present called the harmonics of that tone. Their frequencies are whole number multiples of 40Hz, so, 80, 120, 160, 200, 240, 280. etc... It's more interesting than useful but keep it in mind if you're trying to isolate frequencies or your finding the mid-lows to be muddy.

Another cool thing is that if you just played the frequencies 80, 120, 160, etc. above without the 40, it will clear up all that LOW headroom and your mind will "fill in the missing fundamental frequency 40Hz" It'd be TIGHT if that actually worked!